Rules of writing lewis structures for covalent bonded ions and molecules.
Determining if a bond is ionic, covalent, or polar covalent.
The type of bond is determined by the electronegativities of the elements involved.
The electronegativity difference (the change in electronegativity) between the two atms will determine if it is ionic, covalent, or polar covalent.
Ionic Bonds have very different electronegativities because one bond is giving up it’s electron and another is gaining an electron
Ionic Bonds are formed if the electronegativity difference is > 1.7(Compounds between metals and non metals are usually considered ionic unless the charge to radius ratio is considered and the bond can become polar in exceptional cases)
Covalent bonds have very similar electronegativities because they both want to keep their electrons so they share electrons. Their electronegativity difference is <0.4
Electronegativity differences of 0.4 -1.7 would form a bond called polar covalent bond.
Polar Covalent Bond (Show how a bond looks and how it is polar or not)
Table of Contents
Bonding Notes
Covalent bonding:
Rules of writing lewis structures for covalent bonded ions and molecules.Determining if a bond is ionic, covalent, or polar covalent.